Indervidual acting stupidly, saying something stupid in a manner that makes others that are watching shake their heads and dislike that indervidual. Alternatively can refer to a pansy or picked on indervidual who is easily brort to tears.

Jimmy: "man that kid is clueless, look at him making a pass at that 11 year old"
Matt: "have fun in jail ya loser"
Reece: "talk about chuckin a bartschi..."